Smartphones, skyscrapers, spacecraft. Modern technology seems mind-bogglingly complex. But beneath the surface, it can be beautifully simple. Roma Agrawal deconstructs our most complex feats of engineering into seven fundamental inventions: the nail, spring, wheel, lens, magnet, string and pump. Each of these objects is itself a wonder of design. Together, they have enabled humanity to see the invisible, build the spectacular, communicate across vast distances, and even escape our planet.
Science